Mountain lion doesn't boot

i decide to restart my mac, so i did ( i hit restart from apple menu)
it shut down, tryed to boot, but with grey horizontal loading bar, it was loaded about 10% and then it shut down again
i tryed 5 - 10 times. same story
then i start it with disk utility, and it says that disk cant be repaired, save your data format the disk and reinstall your mountain lion.
ok! if the disk broken (i wonder how could it be???) and i must format disk again,
how i supose to save my data? coz i cant get to finder or anything else
how could it happened with 3 month usage

Heh!
Every new mac that i buy, do break faster than previous!!!
(and YES. My old "PowerBook G4 12 dvi" keep works fine too, PPC unbreakable )
But, in that case, I dont have a backup, I was planning to do it at coming weekend. no luck.
Disk utility says "save my data..." but dont say HOW.
The only solution in my mind is Target Disk Mode.
And i tryed...
• I have another iMac (white one latest 2007, running Leopard 10.5.8)
• 2 firewire 800 cables (they work, checked with WD mybook studio)
• I plug new iMac to white iMac via firewire, then i turn on crashed mac and put it in Target Disk Mode by holding T.
• firewire logo bouncing, but it doesn't mounted on white iMac ((
So I just cant Save My Data. Its ≈200 Gb of unique information (my graphic design files)
Apple not presented in my country yet, but we have authorized dealers, hope they wont bump me.
Any solution to mount TDM appreciated.

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I have the same problem, although mine has not been solved by ESET update, finder settings, PRAM & SMC resets or anything else.
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Mountain lion doesn't start

I istalled Mountain Lion on my macbook pro 2008, the installation goes well, but after it, it never restarts. It stops with the wheel always rotating.
With snow leopard it works perfectly and I tried many text and it doesn't seem that there are some hardware problems.
please, help me

If you have more than one user account, these instructions must be carried out as an administrator.
Launch the Console application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Console in the icon grid.
Step 1
Make sure the title of the Console window is All Messages. If it isn't, select All Messages from the SYSTEM LOG QUERIES menu on the left. If you don't see that menu, select
View ▹ Show Log List
from the menu bar.
Enter "BOOT_TIME" (without the quotes) in the search box. Note the timestamps of those log messages, which refer to the times when the system was booted. Now clear the search box and scroll back in the log to the last boot time when you had the problem. Select the messages logged before the boot, while the system was unresponsive or was failing to shut down. Copy them to the Clipboard (command-C). Paste into a reply to this message (command-V). Please include the BOOT_TIME message at the end of the log extract.
If there are runs of repeated messages, post only one example of each. Don’t post many repetitions of the same message.
When posting a log extract, be selective. In most cases, a few dozen lines are more than enough.
Please do not indiscriminately dump thousands of lines from the log into this discussion.
Important: Some private information, such as your name, may appear in the log. Anonymize before posting.
Step 2
Still in Console, look under System Diagnostic Reports for crash or panic logs, and post the entire contents of the most recent one, if any. In the interest of privacy, I suggest you edit out the “Anonymous UUID,” a long string of letters, numbers, and dashes in the header of the report, if present (it may not be.) Please don’t post shutdownStall, spin, or hang logs — they're very long and not helpful.

Mountain Lion doesn't start, goes into terminal screen

Ever since I upgrades to Mountain Lion from Lion, my system doesn't start correctly. When I boot it, the screen goes into terminal and stops there. I usually have to give the command to exit and then command boot ant it starts up. Other times I have to shut down from terminal and restart. The apple support has not been help full at all. They say do this, do that and then want to hang up without resolving the issue. Can anyone help?

Well - I think we found the issue. It looks to be when you power up the system and turn on the wireless keyboard as it boots up, it sends a signal that triggers single user mode. This never happened with the previous Snow Leopard and Lion. It looks like I should never turn off the keyboard or mouse. They will automatically go to sleep mode after approximately 6 minutes of no system activity. When you power the system, it will send a wake signal to the two devices.
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I upgraded to Moutnain Lion and CS6 at the same time, and one thing I've noticed is that Mac's preview doesn't seem to dig on spot colors. Has anyone else noticed this? It seems to be the case with .ai and PDFs. Not a huge deal; when you open the files, the spot colors display properly, but when you view the files within a folder through Finder, click "space" to preview, or view the file as an attachment within Mail, anything with a spot color previews as solid black, which makes the file appear as if something is "off".
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I'm having the same problem. When I open the Acrobat Files, the color looks fine. When I look at a PDF with spot colors in Preview Mode, in a Window Column View, or as an email attachment, I see SOME of the spot colors showing up as black, but not all of them. It seems to depend on the particular Spot Color.

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Mountain lion OSX not booting

i installed windows 7 on my macbook pro via bootcamp. i got windows 7 up and running (which i'm currently using) but i can't boot my mountain lion os x. when i turn on computer it shows white screen for 5 secs(no apple) then goes to black and loads windows. there is a place in windows control panel where i can choose the System it boots up with but it only give me the option of booting up windows 7. I tried holding down command+R and command+option+R when booting up. but i can't get anything. please help i dont care about windows i just want my mac back the way its supossed to be!!! :/ (the osx is moutain lion 10.8 something i cant remember the other number) and ultimately i want to get rid of windows 7

Somehow in your Windows/Boot Camp adventure you have clobbered your partition map. You should be able to boot from the network provided you have a network connection via Ethernet.
To start reboot the computer and at the chime press and hold down COMMAND-OPTION-R keys until you see a globe near the top of the screen. This might take 15 to 20 minutes so be patient. After the globe appears wait for the Recovery HD screen to appear. From this point it's much like you were using your own Recovery HD. Do the following:
Drive Partition and Format
1. Select Disk Utility from the main menu and click on the Continue button.
2. After DU loads select your hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. Note the SMART status of the drive in DU's status area. If it does not say "Verified" then the drive is failing or has failed and will need replacing. SMART info will not be reported on external drives. Otherwise, click on the Partition tab in the DU main window.
3. Under the Volume Scheme heading set the number of partitions from the drop down menu to one. Click on the Options button, set the partition scheme to GUID then click on the OK button. Set the format type to Mac OS Extended (Journaled.) Click on the Partition button and wait until the process has completed.
4. Select the volume you just created (this is the sub-entry under the drive entry) from the left side list. Click on the Erase tab in the DU main window.
5. Set the format type to Mac OS Extended (Journaled.) Click on the Security button, check the button for Zero Data and click on OK to return to the Erase window.
6. Click on the Erase button. The format process can take up to several hours depending upon the drive size.
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Mountain Lion hangs during boot sequence after reinstall

I am running Mountain Lion on a late-2012 Mac Mini (the newest one at this writing), and my system got messed up after I tried to reset my primary uid to 501 (I know, first mistake) after having migrated the system from an older Mac Mini. This worked partially, but I continued to have issues accessing some files and got tired of resetting the permissions manually.
I tried reinstalling Mountain Lion and since then, the system fails to boot completely. I can get as far as seeing the desktop, Finder menu, Dock, etc., but then one or more error windows pop up relating to specific resources (I think Calendar Agent was one of them, I can't remember because I then saw the spinning disk icon and the system stopped responding). I tried restarting by turning the computer off and then on again, but continue to get similar errors after it gets almost all the way through booting.
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I know how to boot in Single-User mode, which does work, but don't know enough BSD/Darwin to pinpoint the source of this problem and fix it.
Any advice about how to diagnose and/or solve this problem? I would like to be able to correct any uid and gid conflicts that may be causing this, which I believe would work, but am not sure how to do this. I am writing this from Safari after booting in Recovery mode.
Thanks for any help with this. - Klingon725

Back up all data.
This procedure will unlock all your user files (not system files) and reset their ownership and access-control lists to the default. If you've set special values for those attributes on any of your files, they will be reverted. In that case, either stop here, or be prepared to recreate the settings if necessary. Do so only after verifying that those settings didn't cause the problem. If none of this is meaningful to you, you don't need to worry about it.
Step 1
If you have more than one user account, and the one in question is not an administrator account, then temporarily promote it to administrator status in the Users & Groups preference pane. To do that, unlock the preference pane using the credentials of an administrator, check the box marked Allow user to administer this computer, then reboot. You can demote the problem account back to standard status when this step has been completed.
Triple-click the following line to select it. Copy the selected text to the Clipboard (command-C):
{ sudo chflags -R nouchg,nouappnd ~ $TMPDIR.. ; sudo chown -Rh $UID:staff ~ $_ ; sudo chmod -R u+rwX ~ $_ ; chmod -R -N ~ $_ ; } 2> /dev/null
Launch the Terminal application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
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☞ Open LaunchPad. Click Utilities, then Terminal in the icon grid.
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Step 2 (optional)
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Boot into Recovery by holding down the key combination command-R at startup. Release the keys when you see a gray screen with a spinning dial.
When the OS X Utilities screen appears, select
Utilities ▹ Terminal
from the menu bar. A Terminal window will open.
In the Terminal window, type this:
resetpassword
That's one word, all lower case, with no spaces. Then press return. A Reset Password window will open. You’re not going to reset a password.
Select your boot volume ("Macintosh HD," unless you gave it a different name) if not already selected.
Select your username from the menu labeled Select the user account if not already selected.
Under Reset Home Directory Permissions and ACLs, click the Reset button.
Select
 ▹ Restart
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Mail app in Mountain Lion doesn't check mails anymore

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MacBook Pro i7, 10.8.2 with supplemental update

Could it be a possibility that this issue is somehow connected to my new router? I believe this problem started with the new router... So maybe there's a port issue or something?
***Edit***
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mikehenden wrote:
Yes, XP box will print with no problems. The 'Properties' index was where I got the IP address from. Have looked at the 'ports' tab, have a port number and see that the protocol is 'Raw'. SNMP status is enabled and SNMP devide index is 1. Does this mean anything to you?
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Start Mountain Lion server on boot

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Some administrators would argue having a server logged in and showing the Finder etc. is an additional security risk even if you have a good password and the screensaver locked.
It is purely up to you, however if you really want to have the Mac server automatically login and automatically run Server.app then you can do this in System Preferences -> Users & Groups -> Login Options, and then turn on Automatic login for the Administrator account. Then for the Administrator account set Server.app to be run in the Login Items tab.
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Hey, I just installed ML on my OCZ Octane SSD, everything went ok, finally the setup assistant requested reboot which is what I did. However, it got stuck while rebooting and now I can only see flashing question mark icon and ML won't boot at all. The only thing I can do is to boot up in safe mode. I guess that the problem is my SSD (indilinx controller) which ML can't handle (it ran on Lion just fine). Does anyone have the same experience? Any clue how to resolve this? Thank you.

I've confirmed with OCZ that there is a firmware issue with Mountain Lion and they are working on a fix as of July 31, 2012.
No word from them yet, other than the official statement.
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http://www.ocztechnologyforum.com/forum/showthread.php?103700-Mountain-Lion-and- OCZ-Octane-Petrol-and-Octane-S2-SSD-s

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Hi,
I've been running Windows 7 in Boot Camp on Mountain Lion on my 1 month old 27" iMac without any problems. Tonight after I switched the startup partition to be boot camp the machine won't boot. I get the startup sound and the disks spin up, but the system just sits there with a Black Screen. There is no disk activity other than them spinning up.
I've tried starting the machine while holding the option key and also command-r, but nothing is happening. I have the feeling that the bluetooth keyboard has not had the chance to connect to the system before it is hanging.
I tried inserting a Lion OS DVD, thinking that it would at least complain and give me an option to boot back in to Mountain Lion. You can hear the DVD spin up and then go idle.
Any suggestions on how I can recover the situation?
Thanks in advance
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The RAM mismatch might be the problem fix that.
Also backup/data recover naturally, assume TimeMacine or bootable clone is corrupted and backup only files to a storage drive
Most commonly used backup methods
Install OS X on a external drive and boot from it.
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Use Disk Utility on the booted clone to Erase with middle selection (Zero) the ENTIRE internal hard drive
Use Carbon Copy Cloner to reverse clone the clone onto the internal, copies the Recovery HD too.
That should fix it, or else the drive or another hardware issue
..Step by Step to fix your Mac
Install/upgrade RAM or storage drive in Mac's

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I am stumped too. The issue is that the 'pmset -g' command does not allow changing the ExternalMedia flag.
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Mountain lion doesn't boot

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